Size and shape control of LiFePO4 nanocrystals for better lithium ion battery cathode materials

• Published in: Nano research Vol. 6; no. 7; pp. 469 - 477
• Main Authors: Nan, Caiyun, Lu, Jun, Li, Lihong, Li, Lingling, Peng, Qing, Li, Yadong
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2013
• Subjects: Atomic/Molecular Structure and Spectra; Biomedicine; Biotechnology; Chemistry and Materials Science; Condensed Matter Physics; LiFePO4; Materials Science; Nanotechnology; Research Article; 合成过程; 形状控制; 正极材料; 磷酸铁锂; 纳米晶体; 锂离子电池; 颗粒大小; LiFePO; size and shape control; rate capability; lithium ion battery; nanocrystals
• ISSN: 1998-0124; 1998-0000
• DOI: 10.1007/s12274-013-0324-8

Lithium iron phosphate （LiFePO4） is a potential high efficiency cathode material for lithium ion batteries, but the low electronic conductivity and single diffusion channel for lithium ions require good particle size and shape control during the synthesis of this material. In this paper, six LiFePO4 nanocrystals with different size and shape have been successfully synthesized in ethylene glycol. The addition sequence Fe-PO4-Li helps to form LiFePO4 nanocrystals with mostly {010} faces exposed, and increasing the amount of LiOH leads to a decrease in particle size. The electrochemical performance of the six distinct LiFePO4 particles show that the most promising LiFePO4 nanocrystals either have predominant {010} face exposure or high specific area, with little iron（II） oxidation.